516522511661 has 8 divisors (see below), whose sum is σ = 580440013440. Its totient is φ = 456060010032.

The previous prime is 516522511643. The next prime is 516522511711. The reversal of 516522511661 is 166115225615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 516522511661 - 2¹⁴ = 516522495277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516522511961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863749721 + ... + 863750318.

It is an arithmetic number, because the mean of its divisors is an integer number (72555001680).

Almost surely, 2^516522511661 is an apocalyptic number.

It is an amenable number.

516522511661 is a deficient number, since it is larger than the sum of its proper divisors (63917501779).

516522511661 is a wasteful number, since it uses less digits than its factorization.

516522511661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727500075.

The product of its digits is 108000, while the sum is 41.

The spelling of 516522511661 in words is "five hundred sixteen billion, five hundred twenty-two million, five hundred eleven thousand, six hundred sixty-one".